Valvatoidea
Encyclopedia
Valvatoidea is a superfamily
of minute freshwater
and marine
snail
s, aquatic
gastropod mollusks in the informal group Lower Heterobranchia
.
Taxonomic rank
In biological classification, rank is the level in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, and class. Each rank subsumes under it a number of less general categories...
of minute freshwater
Freshwater
Fresh water is naturally occurring water on the Earth's surface in ice sheets, ice caps, glaciers, bogs, ponds, lakes, rivers and streams, and underground as groundwater in aquifers and underground streams. Fresh water is generally characterized by having low concentrations of dissolved salts and...
and marine
Marine (ocean)
Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...
snail
Snail
Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...
s, aquatic
Aquatic animal
An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...
gastropod mollusks in the informal group Lower Heterobranchia
Lower Heterobranchia
Lower Heterobranchia, also known as the Allogastropoda, is a group of rather specialized, highly-evolved sea slugs and sea snails, within the clade Heterobranchia...
.
Taxonomy
- Family ValvatidaeValvatidaeValvatidae, the valve snails, is a taxonomic family of very small freshwater snails with an operculum, aquatic gastropod mollusks.- Taxonomy :...
- Family CornirostridaeCornirostridaeThe Cornirostridae is a taxonomic family of sea snails, marine gastropod mollusks in the informal group Lower Heterobranchia.- References :*...
- Family HyalogyrinidaeHyalogyrinidaeThe Hyalogyrinidae is a taxonomic family of sea snails, marine gastropod mollusks in the informal group Lower Heterobranchia.-Genera:Genera within the family Hyalogyrinidae include:* Hyalogyra Marshall, 1988* Hyalogyrina Marshall, 1988...
- † Family ProvalvatidaeProvalvatidaeThe Provalvatidae is an extinct taxonomic family of sea snails, marine gastropod mollusks in the informal group Lower Heterobranchia.- References :*...